Genetic Variant CLYBL:p.Leu94Val (chr13-99858891-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_206808.5(CLYBL):c.280C>G(p.Leu94Val) variant causes a missense change. The variant allele was found at a frequency of 0.00000683 in 1,610,064 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

CLYBL
NM_206808.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.72

Publications

0 publications found

Variant links:

Genes affected

CLYBL (HGNC:18355): (citramalyl-CoA lyase) Enables (S)-citramalyl-CoA lyase activity; magnesium ion binding activity; and malate synthase activity. Involved in protein homotrimerization and regulation of cobalamin metabolic process. Predicted to be located in mitochondrion. Predicted to be integral component of membrane. [provided by Alliance of Genome Resources, Apr 2022]

CLYBL links:

ENSG00000286757 (HGNC:):

ENSG00000286757 links:

CLYBL-AS3 (HGNC:56191): (CLYBL antisense RNA 3)

CLYBL-AS3 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CLYBL	NM_206808.5 link	c.280C>G	p.Leu94Val	missense_variant	Exon 3 of 9	ENST00000339105.9	NP_996531.1	Q8N0X4-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CLYBL	ENST00000339105.9 link	c.280C>G	p.Leu94Val	missense_variant	Exon 3 of 9	1	NM_206808.5	ENSP00000342991.4		Q8N0X4-1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152200

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000131

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000324

AC:

AN:

247030

AF XY:

0.0000300

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000210

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000890

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000617

AC:

AN:

1457864

Hom.:

Cov.:

AF XY:

0.00000552

AC XY:

AN XY:

725184

show subpopulations

African (AFR)

AF:

0.0000301

AC:

AN:

33178

American (AMR)

AF:

0.000160

AC:

AN:

43618

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25932

East Asian (EAS)

AF:

0.00

AC:

AN:

39646

South Asian (SAS)

AF:

0.00

AC:

AN:

85214

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53390

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5738

European-Non Finnish (NFE)

AF:

9.00e-7

AC:

AN:

1110952

Other (OTH)

AF:

0.00

AC:

AN:

60196

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.508

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74346

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41456

American (AMR)

AF:

0.000131

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10612

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68034

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000264

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 30, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.280C>G (p.L94V) alteration is located in exon 3 (coding exon 3) of the CLYBL gene. This alteration results from a C to G substitution at nucleotide position 280, causing the leucine (L) at amino acid position 94 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Benign

-0.012

BayesDel_noAF

Uncertain

0.010

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.11

T;.;T;T;T

Eigen

Pathogenic

0.72

Eigen_PC

Pathogenic

0.72

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.83

.;T;T;T;T

M_CAP

Benign

0.018

MetaRNN

Uncertain

0.56

D;D;D;D;D

MetaSVM

Benign

-0.80

MutationAssessor

Uncertain

2.4

M;M;M;.;.

PhyloP100

3.7

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-2.6

D;D;D;D;D

REVEL

Benign

0.24

Sift

Uncertain

0.0030

D;D;D;D;D

Sift4G

Uncertain

0.0040

D;D;D;D;D

Polyphen

1.0

D;D;D;.;.

Vest4

0.81

MutPred

0.67

Gain of catalytic residue at L99 (P = 0);Gain of catalytic residue at L99 (P = 0);Gain of catalytic residue at L99 (P = 0);.;.;

MVP

0.41

ClinPred

0.61

GERP RS

5.9

PromoterAI

0.0046

Neutral

(source)

Varity_R

0.90

gMVP

0.61

Mutation Taster

=8/92

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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13-99858891-C-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over